Wireworking machine



May15,192s. y 1,670,006

H. PRYM l Y W lREWORKING MACHINE Filed June 2, 1926 Patented May 15, 1928.

IUNITED STATES PATENT OFFICE.

n ANs rant, oF sroLeEne, GERMANY.

wIaEWonxING MACHINE.

Application led June 2, 1926, Serial No.

This invention relates to an improved wire clamping and feeding device for wireworking machines especially adapted for work with short but straight Wire pieces.

Levers moved b cani disks and executing two different kin s of movements namely a movement perpendicular to the wire for clamping and another movement gitudinal direction ofthe wire for moving l it, were used until now in the art. This double movement is not only uncomfortable,

but affords too much force for clamping.

The lever is subjected to a very strong strain of exure and .its end sliding on .the cam disk becomes so hot for the high speed of Athe machine, that the lubricant evaporates. Furthermore the feeding carriages are very strongly loaded by thc'clamping pressure.

These disadvantages are avoided according to this invention, by only allowing the lever to move in one direction namely for feeding, whereas tho wire is clamped .by small tongs, which is closedbyl manifold leverage the closing only affording a very small pressure.

A construction of a device according to this invention vis illustrated in the drawing, in which l Fig. 1 isA a side elevation of a part of the wire-working machine showing the invention applied thereto, and

Fig. 2 is a vertical section thereof.

A doublearmed lever c geared .in a bearing o is reciprocated'b the cam disk b on the driven shaft a o the machine. The lever c is connected by means of a rotatable joint e with a carriage d sliding in a straight line. Tongs f mounted be pw the jointe in the carriage d are closed from the shaft a. 'For this purosethe cam disk g on the shaft a swings t 'e bent lever. h about the pivot h2, a roll h1 of the lever h. lying on s id cam disk g. The movement of the bent lever h is transferred'by the pin z' onto an adjustable tappet k2 of adouble lever lc.

This lever 7c is mounted movably on the pivot c of the lever o and presses by medium of a pin l on the movable side piece of the tongs f, thereby clamping the. wire q. The pivot 2 is journaled in a projection p of the bearing oi.A The tongs f are opened again by a small s ring m, disposed between t e side ieces o the tongs f, as soon as the roll h1 of the bent lever h has run down in the lon- V vwires in wire-working machines, a slidable 113,216, and iii Germany June 27, l1925.

from the pitch 4of the cam disk g. Against 65 thearm lul of the double lever presses a spring '1i returning the latter. A rolling friction is present between the roll /i of the bent lever li. Due to the described construction the pressure which vis necessary for clamping' the wire is very small, because:

1. between the roller h1 and the curved disk only rolling friction exists, and l 2. because a large lever transmission is preserict bet-Ween the lcurved disk g and the 66 ong The advantages of the new device are to be found in that the levers execute movements only in one direction, that the sliding carriages lare free from the pressure, which else was necessary for clamping the Wire and that only a very sli ht pressure is suiicient for the clamping o the wire.

l. In a-device for clamping and feeding wires in wire-Working machines, a slidable4 carriage for feeding the wire, a driven shaft, a cam disk on said shaft, adouble lever moved by said cam disk and reciprocating said carriage, separate wire clamping means in said carriage and separate means mounted directly on the double lever for actuating said clamping means.

2. In a device for clamping and feeding 85 carriage, a driven shaft, a cam disk on said shaft, a swinging .double lever moved b said cam disk and. engaging with said sli able carriage, clamping tongs in said slidable carriage and means actuating said clamping tongs including a lever pivoted to a double lever and directly engaging one of the -tongs. 1

3. In a device for clamping and feeding wires in wire-working machines,-ae slidablev carriage, a driven shaft, acam disk on said shaft, a swinging double lever moved by said cani disk and engaging with said'slidable Y carriage,` clamping tongs in said slidable carriage,l a seond cam disk on said shaft, a` bent lever moved by said'..eain,disk, a second lever pivoted on the firstL mentioned lever and actuated by the bent lever and closing said tongs, a spring between the-side-parts of said tongs, and a spring actuated arm 105 on the second lever.

In testimony whereof I ailix m signature.

Harisy PR 

